NCLE Practice Test Practical
1. "Haptic" lens is used in reference to - ANS-Scleral lens
2. A aspheric PCC - ANS-Is a toric pcc and has a specific eccentricity value
3. A bi-toric rigid lens will show - ANS-Two base curves on the radiuscope,
sphero-cylindrical rx on the lensometer
4. A bifocal design that utilizes a small central reading area and a distance periphery is -
ANS-Reverese Centrad
5. A dynamic flourescein pattern is best illuminated by - ANS-Cobalt blue light
6. A finished contact lens will have the following properties - ANS-1. Diameter cut to size
both sides surfaced
7.
8.
9. 2. Peripheral curves have been added
10.
11.
12. 3. Edge has been finished.
13. A protein found in the tear film that is a potent germ killer - ANS-Lysozyme
14. A rigid contact lens shows a flourescein pattern inferiorly and superiorly beneath the
lens. This is indicative of which type of astigmatism - ANS-With-the-rule
15. A single cut aphakic lens is best suited for patients with ______ apertures and
______corneas.
16.
17. a. small / flat
18. b. small / steep
19. c. large / flat
20. d. large / steep - ANS-a. small / flat
21. According to the FDA, disposable contact lenses that are removed nightly, should be
discarded after: - ANS-1 month
22. Against-the-rule Astigmatism Pattern - ANS-Bright green pooling horizontally, faint green
pooling vertically
23. An "ideal" flouorescein pattern for a spherical lens on a spherical cornea would show -
ANS-An even distribution of flourescein with added thickness under the peripheral
curves
24. An advantage of a flourocarbon lens is its - ANS-High DK value
25. An RGP is found to flex on the eye, which lens mods are available to the fitter?
26.
27. a. larger diameter
28. b. steeper base curve
29. c. flatten base curve
30. d. thicker lens
, 31. e. c and d - ANS-e. c and d
32.
33. Flatten base curve and thicker lens
34. Aphakic - ANS-Condition of no crystalline lens
35. Apical flourescein pooling under a rigid lens indicates - ANS-A tight fit
36. Apical flourescein pooling under a rigid lens indicates: - ANS-a flat fit
37. Aspheric Lens Design - ANS-
38. Astigmatism that is left over after a contact lens is placed on the eye - ANS-Residual
Astigmatism
39. At a 36.00D curve on the keratometer measures approximately ____mm chord of the
cornea.
40.
41. a. 4mm
42. b. 8mm
43. c. 3mm
44. d. 1mm - ANS-a. 4mm
45. Back Toric Lens - ANS-Corrects a mid to high amount of corneal astigmatism
46. Back toric lens works with - ANS-High corneal toricity
47. Bitoric Lens - ANS-Corrects 1.50D of corneal astigmatism and high residual astigmatism
48. Corneal Edema - ANS-Always causes a poor fitting lens
49. Corneal epithelial edema will appear as - ANS-A grey haze, using a slit lamp with
sclerotic scatter and the unaided eye
50. Corneal epithlial edema will appear as: - ANS-microcysts, using a slit lamp with retro
illumination
51. Crystalline Lens - ANS-The main focusing mechanism of the eye
52. Dellen - ANS-Localized area of corneal drying and evaporation
53. Diameter of a contact lens can be reduced by:
54.
55. a. razor blade
56. b. cut down stone
57. c. file technique
58. d. all the above - ANS-d. all the above
59. Diffuse corneal stippling obsered during a routine 6 month follow-up visit is most like due
to - ANS-Posterior surface deposits
60. DK/L stands for - ANS-Oxygen Transmissibility
61. Double Slab-off - ANS-Lens is thicker centrally and thinner at top and bottom of lens.
Provides comfort to wearer, but may cause some stability issues.
62. Fenestrations are put into a lens to - ANS-Increase oxygen transmission
63. Flat Fluorescein Pattern - ANS-Bright green pooling on diameter of lens, very faint green
in center
64. Fluorescein patter which shows a touch of apperance in the horizontal meridian and a
bright green in the vertical indicates - ANS-With the rule astigmatism
65. For every 1.00D step, there's approximately 0.20mm change in diameter.
66.
1. "Haptic" lens is used in reference to - ANS-Scleral lens
2. A aspheric PCC - ANS-Is a toric pcc and has a specific eccentricity value
3. A bi-toric rigid lens will show - ANS-Two base curves on the radiuscope,
sphero-cylindrical rx on the lensometer
4. A bifocal design that utilizes a small central reading area and a distance periphery is -
ANS-Reverese Centrad
5. A dynamic flourescein pattern is best illuminated by - ANS-Cobalt blue light
6. A finished contact lens will have the following properties - ANS-1. Diameter cut to size
both sides surfaced
7.
8.
9. 2. Peripheral curves have been added
10.
11.
12. 3. Edge has been finished.
13. A protein found in the tear film that is a potent germ killer - ANS-Lysozyme
14. A rigid contact lens shows a flourescein pattern inferiorly and superiorly beneath the
lens. This is indicative of which type of astigmatism - ANS-With-the-rule
15. A single cut aphakic lens is best suited for patients with ______ apertures and
______corneas.
16.
17. a. small / flat
18. b. small / steep
19. c. large / flat
20. d. large / steep - ANS-a. small / flat
21. According to the FDA, disposable contact lenses that are removed nightly, should be
discarded after: - ANS-1 month
22. Against-the-rule Astigmatism Pattern - ANS-Bright green pooling horizontally, faint green
pooling vertically
23. An "ideal" flouorescein pattern for a spherical lens on a spherical cornea would show -
ANS-An even distribution of flourescein with added thickness under the peripheral
curves
24. An advantage of a flourocarbon lens is its - ANS-High DK value
25. An RGP is found to flex on the eye, which lens mods are available to the fitter?
26.
27. a. larger diameter
28. b. steeper base curve
29. c. flatten base curve
30. d. thicker lens
, 31. e. c and d - ANS-e. c and d
32.
33. Flatten base curve and thicker lens
34. Aphakic - ANS-Condition of no crystalline lens
35. Apical flourescein pooling under a rigid lens indicates - ANS-A tight fit
36. Apical flourescein pooling under a rigid lens indicates: - ANS-a flat fit
37. Aspheric Lens Design - ANS-
38. Astigmatism that is left over after a contact lens is placed on the eye - ANS-Residual
Astigmatism
39. At a 36.00D curve on the keratometer measures approximately ____mm chord of the
cornea.
40.
41. a. 4mm
42. b. 8mm
43. c. 3mm
44. d. 1mm - ANS-a. 4mm
45. Back Toric Lens - ANS-Corrects a mid to high amount of corneal astigmatism
46. Back toric lens works with - ANS-High corneal toricity
47. Bitoric Lens - ANS-Corrects 1.50D of corneal astigmatism and high residual astigmatism
48. Corneal Edema - ANS-Always causes a poor fitting lens
49. Corneal epithelial edema will appear as - ANS-A grey haze, using a slit lamp with
sclerotic scatter and the unaided eye
50. Corneal epithlial edema will appear as: - ANS-microcysts, using a slit lamp with retro
illumination
51. Crystalline Lens - ANS-The main focusing mechanism of the eye
52. Dellen - ANS-Localized area of corneal drying and evaporation
53. Diameter of a contact lens can be reduced by:
54.
55. a. razor blade
56. b. cut down stone
57. c. file technique
58. d. all the above - ANS-d. all the above
59. Diffuse corneal stippling obsered during a routine 6 month follow-up visit is most like due
to - ANS-Posterior surface deposits
60. DK/L stands for - ANS-Oxygen Transmissibility
61. Double Slab-off - ANS-Lens is thicker centrally and thinner at top and bottom of lens.
Provides comfort to wearer, but may cause some stability issues.
62. Fenestrations are put into a lens to - ANS-Increase oxygen transmission
63. Flat Fluorescein Pattern - ANS-Bright green pooling on diameter of lens, very faint green
in center
64. Fluorescein patter which shows a touch of apperance in the horizontal meridian and a
bright green in the vertical indicates - ANS-With the rule astigmatism
65. For every 1.00D step, there's approximately 0.20mm change in diameter.
66.
